Furnace-chamber construction



E. P. STEVENS FURNACE CHAMBER CONSTRUCTION Aug I7 1926.

Filed ov. 20, 1922 2 Sheets-Sheet 1 E. P. STEVENS FURNACE CHAMBER cousmucnou Filed Nov. 20, 1922 2 Sheets-Sheet 2 Patented Aug. 17, 1926.

UNITED STATES 1,596,695 PATENT OFFICE.

nnocn r. STEVENS, or cmosso, rumors; MARY ANN s'rnvnus nxncnrnrx on sun Y ENOCH r. s'rnvnns, nncnasnn.

FURNACE-CHAMBER cons'rnnorron.

Application filed November 20, 1922. Serial No. 602,018.

This invention relates to the construction of furnace or combustion chambers and one of its primary objects is to obtain the advantages and to avoid certain disadvantages which are incident to sectional and monolithic structures.

Another object of the invention is to pro-- long the life of combustion chambers and to simplify and cheapen repair thereof, when repair is necessary.-

. i I Y The foregoing, together with such objects as may hereinafter appear or are in-I cident to my invention, I obtain by means of a construction which I have illustrated in preferred form in the accompanying drawings, wherein:

Fig. 1 is a cross section through a furnace chamber embodying my improvements; Fig. 2 is a cross section through one of the walls, drawn onan enlarged scale; Figs. 3 and 4 are perspective views illustrating certain of the bricks used in constructing the walls; and Figs. 5 and 6 illustrate a modification of the invention.

In the drawings, I have illustrated my in- 'vention. as applied to the combustion chamher of a stoker fired stationary boiler, for.

purposes of illustration. This chamber is provided with side walls 7 a roof or arch 8, and a rear wall (not shown).

The side and rear walls are composed of bricks preferably constructed and arranged as follows:

There are courses of stretcher tiles or bricks A, with a corresponding course or courses of ordinary tiles B; a course of header bricks C between a course or courses of the bricks A and B; then a course of the header brick C; etc. The header bricks C serve to tie or anchor the bricks A and B which are of less length; that is to say, they tie the bricks together crosswise of the wall. The bricks A and also, if desired, the bricks B are of a greater width than the bricks C and serve to tie or anchor adjacent bricks lengthwise of the wall.

The header bricks C have a inner end'faces, such slot merging with a groove 10 formed by cutting away the bottom inner edge of the bricks, so that, as shown in Figs. 2 and 3, their faces are of narrower width than the thickness ofthe bricks. The -slot 9 and the groove 10 form a T-shaped recess in the inner faces .of the bricks. I

slot 9 in their The stretcher bricks have a groove 10' formed by cutting away the inner bottom edge of the inner face of the brick in thesame fashion as in the case of the groove 10. above mentioned; they have a slot 9, the same as the bricks C; and have grooves 11 formed by cutting awaythe end edges of the inner face.

When the bricks are assembled it will be seen that grooves which intersect each other at right angles are provided on the inner face of the'walls. These grooves are widened toward their base.

A lining 12 is applied to the inner faces of the walls in any preferred manner, such lining being preferably applied in a plastic condition and composed of. refractory material, i. e., material capable of withstanding high temperatures and adapted to resist the scouring action of the flame. In applying such a lining-which may be termed a monolithic liningprojecting portions or tongues 13 will be formed fitting the grooves before mentioned and interlocking the lining with the walls.

The roof or arch 8 is composed of rows 1 of hung courses of brick or tileD,ha'ving heads 1-3 by means of which such courses are suspended from the supports 14, through the medium of hangers 15. These bricks are also shouldered so asto support intermediate courses of brick E, which are of'T shape. The end of the arch is formed of the nose bricks F. The bricks D, E and F are grooved and lined as before.

The lining presents a comparatively smooth, uninterrupted surface,:more impervious to the action of the flame and to penetration by the products of combustion. There will be less tendency to spall than is the case with exposed bricks and the eating away which is apt to take place at the joints between bricks is obviated. When the linin becomes worn, a fresh lining may be applied directly over the old lining, if desired. Thus, in making repairs, it is unnecessary to disturb the bricks composing the respective wall portions of the chamber.

In the main, however, in so far as the walls-themselves areconcerned, these retain all of the advantages incident to a built up or sectional construction, particularly in so far as manufacture, shipping, installation bine the advantages of monolithic and built stretcher header bricks, .the header up or sectional construction and avoid some bricks having their mner bottom edge out 15 of the disadvantages incident; to either con-' away and being provided with a slot in the struction, considered alone. mner end face merging with the recess The monolithic lining .should preferably formed at said bottom edge, and the be composed of a material having substan: stretcher brick having their inner end and tially the same co-efiicient of expansion as bottom edges cut away and having a slot in 20 the bricks. the inner end face m'er g with the recess In the construction of Figs. 5 and '6 the in said bottom edge, an a refractory .inner grooves are round instead of tapered in lining r 4 7 cross section. a In testimony whereo f,, I. have hereunto What I claim 1s: signed my name.

A furnace chamber wall composed o v ENOCH PQSTEVENS 

